diff --git a/Fonderie/sfx.h b/Fonderie/sfx.h
index c70a1966..69e8e5bf 100644
--- a/Fonderie/sfx.h
+++ b/Fonderie/sfx.h
@@ -16,10 +16,6 @@ int upside_down(FloatImg *pimg);
 
 int des_bords_sombres_a(FloatImg *pimg, int offset);
 
-int trinarize(FloatImg *pimg, int notused);	// in sfx.c
-
-int binarize(FloatImg *pimg, int notused);
-
 int brotche_rand48_a(FloatImg *fimg, float ratio, float mval);
 int brotche_rand48_b(FloatImg *fimg, float ratio, float mval);
 int colors_brotcher(FloatImg *fimg, float fval);